68605543 has 2 divisors, whose sum is σ = 68605544. Its totient is φ = 68605542.

The previous prime is 68605513. The next prime is 68605567. The reversal of 68605543 is 34550686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68605543 - 2¹³ = 68597351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68605513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34302771 + 34302772.

It is an arithmetic number, because the mean of its divisors is an integer number (34302772).

Almost surely, 2^68605543 is an apocalyptic number.

68605543 is a deficient number, since it is larger than the sum of its proper divisors (1).

68605543 is an equidigital number, since it uses as much as digits as its factorization.

68605543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 68605543 is about 8282.8463102970. The cubic root of 68605543 is about 409.3735087878.

It can be divided in two parts, 6860 and 5543, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 68605543 in words is "sixty-eight million, six hundred five thousand, five hundred forty-three".